Write sample space 'S' and number of sample point n(S) for each of the following experiments. Also write events P, Q, R in the set form and write n(P), n(Q), n(R).
A box contains 20 balls, bearing only one number from 1 to 20 on each . If one ball is drawn at random.
Condition for event P : Number of the ball is divisible by 4 .
Condition for event Q : Number on the ball is prime number
Condition for event R : Number on the ball is an odd number less than 15 .

Answer

S = { 1, 2, 3, 4, ...., 20 } , n (S) = 20
P = { 4, 8, 12, 16, 20 }, n (P) = 5
Q = { 2, 3, 5, 7, 11, 13, 17, 19}, n (Q) = 8
R = { 1, 3, 5, 7, 9, 11, 13} , n (R) = 7